Question

2004 Nissan Murano with code P1273, what is monitoring bank 1?

Answer 1

Monitoring: Observe and check the progress or quality of (something) over a period of time.

The Engine Control Module (ECM) is monitoring the Bank 1 (left side) of the engine.

The P1273 means that there is a problem with the Bank 1 of the engine. The Bank 1 is running too lean (either too much air or not enough gas on that side of the engine)

P1273 NISSAN - Air Fuel Ratio Sensor 1 Lean Shift Monitoring Bank 1

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